Square

Jack Dorsey (American, born 1976)

2010

ABS, permalloy, copper, PVC, and
carbon film resistor

1 x 1 x 5/8"
(2.5 x 2.5 x 1.5 cm)

Square, Inc., USA

Square is a tiny attachment that can
be plugged into the headphone jack
of a smartphone or tablet to allow anyone
to accept a credit card payment. The
card is slid through the attachment;
signatures on touch screens stand in
for printed receipts. This simple idea is
as efficient and potentially transformative
as designer Jack Dorsey’s previous
big idea: he is one of the co-inventors
of Twitter.